A group of people working together in online multiplayer games. They may just play together for fun, or have training sessions and compete in tournaments.

While there are exceptions, a majority of clans are filled with holier-than-thou assholes who think they're really something because they have a tag in front of their nickname. Any questioning of clan members invariably results in getting insulted repeatedly, so it's best to just let them be idiots and remember what it was like to be a teenager on the Internet anonymously.

A clan is a group of people, typically in online games like Halo and Call of Duty, where they play together and may either just play online together, or compete in tournaments.

Most clans consist of 12 year old kids who think it is cool to be in a clan. Clans were cool in 2005, not so much now.

It is probably at its worst in Halo Reach and Halo 4. The File Browser consists of thousands of screenshots where clan members ask you to join their lame clan. These clans also get into fights with each other over the File Browser. No one cares about your stupid clan, and no one cares about your stupid clan drama. Just shut up and go away.

A clan is similar to the mafia family,
Clan name= origional family name
A number of families=a clan
clans are also know as Famlies, other families can become assosiates of the clan by marrying into it but they will never be members or 'family' because you have to be related by blood, clan or family members can be members of a gang structure but the family always comes first, membership of gangs also leads to links or ties between clans.

my mothers mother is the head of the clan because she is decended from the origional founder by blood, this means that i am a member of the family, i am also a 'pure blood member' because i am directly decended from the origional founder, although my father is loved by all in the family, he will never be more than an assosiate because he is not blood related to the clan.